Where can I find a mpa of the rivres and lakes (with names and locations) of the Minnesota Territory, 1849-1858?
This is the best map I could find online of the Minnesota Territory.
http://www.rootsweb.ancestry.com/~mngenweb/mnterr.htm
It's very hard to read the names of the lakes and rivers on this map. I suggest you consult modern maps of Minnesota and eastern North Dakota and South Dakota to find more readable maps showing lakes and rivers.
http://www.lib.utexas.edu/maps/united_states.html#states.html